06. Fishland

import java.util.Scanner;

public class T15 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        double SkumriqPKG = Double.parseDouble(scanner.nextLine());
        double CacaPKG = Double.parseDouble(scanner.nextLine());
        double PalamudKG = Double.parseDouble(scanner.nextLine());
        double SafridKG = Double.parseDouble(scanner.nextLine());
        double MidiKG = Double.parseDouble(scanner.nextLine());

        double PalamudPKG = SkumriqPKG + (SkumriqPKG * 0.60);
        double PalamudSUMA = PalamudKG * PalamudPKG;
        double SafridPKG = CacaPKG + (CacaPKG * 0.80);
        double SafridSUMA = SafridKG * SafridPKG;
        double MidiSUMA = MidiKG * 7.50;
        double SMETKA = PalamudSUMA + SafridSUMA + MidiSUMA;

        System.out.printf("%.2f", SMETKA);



    }
}